Yeah, I agree with what fire49 said regarding how they know what questions and types of tests each dept utilizes.

Just for kicks I looked up several of the ones that I have tested with: 2 large depts weren't even listed for my state and my combination dept (which has no written to get hired) was listed with "specialized" info on how to pass the written. Just seems to far fetched and I didn't bother looking how much it was for a membership after that.

Not saying it won't be useful, but probably along the same lines as a Barron's written test book or the like. Good practice, but I would be skeptical about specific insider info on depts.